Buoyancy compensator (diving)

A buoyancy compensator also called a buoyancy control device, BC, BCD, stabilizer, stabilisor, stab jacket, wing or ABLJ depending on design, is a piece of diving equipment containing a bladder which is worn by divers to establish neutral buoyancy underwater and positive buoyancy on the surface, when needed. The buoyancy is controlled by adjusting the volume of air in the bladder. The bladder is filled with gas from the diver's air tank or from the diver's mouth.

Features

  • Regulator first stage
  • Cylinder valve
  • Shoulder straps
  • Buoyancy compensator bladder
  • Relief and bottom manual dump valve
  • Regulator second stages (with “octopus”)
  • Console (pressure gauge, depth gauge & compass)
  • Dry-suit inflator hose
  • Backplate
  • BC inflator hose
  • Oral inflation mouthpiece and manual dump valve
  • Crotch strap
  • Waist strap
  • All BCs will have some features in common:

  • A bladder to contain gas which may be added or released during the dive to control buoyancy.
  • A means of adding gas to the bladder, generally a low pressure direct feed or Power Inflator that injects gas from a low pressure hose from the diving cylinder's diving regulator or an auxiliary cylinder to the bladder(s) of the BC, that is controlled by an inflation valve, and usually an oral inflation option. These are usually at the end of a corrugated rubber inflation hose.
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    Latest News for: stab jacket

    Nurse stabbed by colleague tells court she could not understand reason behind attack

    The Malta Independent 01 Apr 2025
    The woman allegedly told the police inspectors that on the day of the attack, she went to grab her jacket from the staff changing rooms and upon turning around, the accused was behind her and he subsequently stabbed her there and then.

    Why a Nashville CEO suddenly revealed his childhood trauma at a worldwide business meeting

    The Tennessean 26 Mar 2025
    Eight years of being called a loser, being threatened with violence, having his lunch, his books, his jackets stolen or damaged. A classmate once stabbed him in the neck with a pen as a bunch of other kids looked on and laughed.

    Guilty, mother who stabbed her boyfriend through the heart with his 12-inch hunting knife | ...

    The Daily Mail 17 Mar 2025
    Jevin Haig, 21, died after being stabbed by his girlfriend Dionne Christie ... The court heard claims Christie had been violent previously towards Mr Haig, stabbing him in the leg, slashing a jacket, and cutting up most of his clothes.

    Police storm Mong Kok building in manhunt for Fo Tan murder suspects

    Hong Kong Standard 17 Mar 2025
    While police maintained vigilance at the building's entrance, multiple PTU officers were observed entering the building this afternoon (Mar 17), wearing stab-proof jackets and helmets, along with shields and demolition tools.
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